tests: Move run-pass tests without naming conflicts to ui

src/test/ui/unwind-unique.rs

@@ -0,0 +1,16 @@
+// run-pass
+// ignore-emscripten no threads support
+
+#![feature(box_syntax)]
+
+use std::thread;
+
+fn f() {
+    let _a: Box<_> = box 0;
+    panic!();
+}
+
+pub fn main() {
+    let t = thread::spawn(f);
+    drop(t.join());
+}